## Troubleshooting

1\. After uploading the code, the micro:bit 5x5 matrix shows a crying face, and it will display error messages in a scrolling manner.

2\. If the uploaded code has characters added or deleted by mistake, you can check it according to the prompts in the shell.

![Img](./media/g002.png)

3\. If the uploaded code contains third-party library files, first check whether the corresponding libraries have been uploaded to the micro:bit board. For how to import library, please refer to “**5.1.4 Upload Code**”. 

4\. After uploading the code, no data is printed. You need to click "![Img](./media/t027.png)"first, and then press the reset button on the back of the Micro:bit board, after which the data prints normally.

![Img](./media/g001.png)

5\.  The micropython firmware will be lost after burning the Makecode code, and the shell will prints the error messages:

![Img](./media/g000.png)

At this moment, you need to burn the firmware again, referring to **5.2.3 Burn Micropython Firmware (Important)**.